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<a name="1" href="#1">1</a>   <em>/**<em>*</em></em>
<a name="2" href="#2">2</a>   <em> * $Id: ClassDataCacher.html 10 2008-10-01 10:56:15Z azeckoski $</em>
<a name="3" href="#3">3</a>   <em> * $URL: http://reflectutils.googlecode.com/svn/maven/site/xref/org/azeckoski/reflectutils/ClassDataCacher.html $</em>
<a name="4" href="#4">4</a>   <em> * FieldUtils.java - genericdao - May 19, 2008 10:10:15 PM - azeckoski</em>
<a name="5" href="#5">5</a>   <em> **************************************************************************</em>
<a name="6" href="#6">6</a>   <em> * Copyright (c) 2008 Aaron Zeckoski</em>
<a name="7" href="#7">7</a>   <em> * Licensed under the Apache License, Version 2.0</em>
<a name="8" href="#8">8</a>   <em> * </em>
<a name="9" href="#9">9</a>   <em> * A copy of the Apache License has been included in this </em>
<a name="10" href="#10">10</a>  <em> * distribution and is available at: <a href="http://www.apache.org/licenses/LICENSE-2.0.txt" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0.txt</a></em>
<a name="11" href="#11">11</a>  <em> *</em>
<a name="12" href="#12">12</a>  <em> * Aaron Zeckoski (azeckoski @ gmail.com) (aaronz @ vt.edu) (aaron @ caret.cam.ac.uk)</em>
<a name="13" href="#13">13</a>  <em> */</em>
<a name="14" href="#14">14</a>  
<a name="15" href="#15">15</a>  <strong>package</strong> org.azeckoski.reflectutils;
<a name="16" href="#16">16</a>  
<a name="17" href="#17">17</a>  <strong>import</strong> java.lang.ref.SoftReference;
<a name="18" href="#18">18</a>  <strong>import</strong> java.util.Map;
<a name="19" href="#19">19</a>  
<a name="20" href="#20">20</a>  <strong>import</strong> org.azeckoski.reflectutils.ClassFields.FieldFindMode;
<a name="21" href="#21">21</a>  <strong>import</strong> org.azeckoski.reflectutils.refmap.ReferenceMap;
<a name="22" href="#22">22</a>  <strong>import</strong> org.azeckoski.reflectutils.refmap.ReferenceType;
<a name="23" href="#23">23</a>  
<a name="24" href="#24">24</a>  <em>/**<em>*</em></em>
<a name="25" href="#25">25</a>  <em> * Class which provides access to the analysis objects and the cached reflection data</em>
<a name="26" href="#26">26</a>  <em> * </em>
<a name="27" href="#27">27</a>  <em> * @author Aaron Zeckoski (azeckoski @ gmail.com)</em>
<a name="28" href="#28">28</a>  <em> */</em>
<a name="29" href="#29">29</a>  <strong>public</strong> <strong>class</strong> <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a> {
<a name="30" href="#30">30</a>  
<a name="31" href="#31">31</a>      <em class="comment">// CONSTRUCTORS</em>
<a name="32" href="#32">32</a>  
<a name="33" href="#33">33</a>      <em>/**<em>*</em></em>
<a name="34" href="#34">34</a>  <em>     * default constructor - protected</em>
<a name="35" href="#35">35</a>  <em>     */</em>
<a name="36" href="#36">36</a>      <strong>protected</strong> <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a>() {
<a name="37" href="#37">37</a>          <strong>this</strong>( <strong>null</strong>, <strong>null</strong> );
<a name="38" href="#38">38</a>      }
<a name="39" href="#39">39</a>  
<a name="40" href="#40">40</a>      <em>/**<em>*</em></em>
<a name="41" href="#41">41</a>  <em>     * Construct and specify a mode for looking up fields which does not match the default: {@link FieldFindMode#HYBRID}</em>
<a name="42" href="#42">42</a>  <em>     * @param fieldFindMode the mode when looking up fields in classes</em>
<a name="43" href="#43">43</a>  <em>     * &lt;br/></em>
<a name="44" href="#44">44</a>  <em>     * &lt;b>WARNING:&lt;/b> if you don't need this control then just use the {@link #getInstance()} method to get this</em>
<a name="45" href="#45">45</a>  <em>     */</em>
<a name="46" href="#46">46</a>      <strong>public</strong> <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a>(FieldFindMode fieldFindMode) {
<a name="47" href="#47">47</a>          <strong>this</strong>( fieldFindMode, <strong>null</strong> );
<a name="48" href="#48">48</a>      }
<a name="49" href="#49">49</a>  
<a name="50" href="#50">50</a>      <em>/**<em>*</em></em>
<a name="51" href="#51">51</a>  <em>     * Construct and specify the field finding mode and your own cache when caching class data, must implement the standard map interface but</em>
<a name="52" href="#52">52</a>  <em>     * only the following methods are required:&lt;br/></em>
<a name="53" href="#53">53</a>  <em>     * {@link Map#clear()}, {@link Map#size()}, {@link Map#put(Object, Object)}, {@link Map#get(Object)} &lt;br/></em>
<a name="54" href="#54">54</a>  <em>     * &lt;br/></em>
<a name="55" href="#55">55</a>  <em>     * &lt;b>WARNING:&lt;/b> if you don't need this control then just use the {@link #getInstance()} method to get this</em>
<a name="56" href="#56">56</a>  <em>     * </em>
<a name="57" href="#57">57</a>  <em>     * @param fieldFindMode the mode when looking up fields in classes (null for default of {@link FieldFindMode#HYBRID})</em>
<a name="58" href="#58">58</a>  <em>     * @param reflectionCache a map implementation to use as the cache mechanism (null to use internal)</em>
<a name="59" href="#59">59</a>  <em>     */</em>
<a name="60" href="#60">60</a>      @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="61" href="#61">61</a>      <strong>public</strong> <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a>(FieldFindMode fieldFindMode, Map&lt;Class&lt;?>, ClassFields> reflectionCache) {
<a name="62" href="#62">62</a>          setFieldFindMode(fieldFindMode);
<a name="63" href="#63">63</a>          setReflectionCache(reflectionCache);
<a name="64" href="#64">64</a>  
<a name="65" href="#65">65</a>          ClassDataCacher.setInstance(<strong>this</strong>);
<a name="66" href="#66">66</a>      }
<a name="67" href="#67">67</a>  
<a name="68" href="#68">68</a>      <em class="comment">// class fields</em>
<a name="69" href="#69">69</a>  
<a name="70" href="#70">70</a>      <strong>protected</strong> FieldFindMode fieldFindMode = FieldFindMode.HYBRID;
<a name="71" href="#71">71</a>      <em>/**<em>*</em></em>
<a name="72" href="#72">72</a>  <em>     * Set the mode used to find fields on classes (default {@link FieldFindMode#HYBRID}) &lt;br/></em>
<a name="73" href="#73">73</a>  <em>     * &lt;b>WARNING&lt;/b>: changing modes will clear the existing cache</em>
<a name="74" href="#74">74</a>  <em>     * </em>
<a name="75" href="#75">75</a>  <em>     * @param fieldFindMode see FieldFindMode enum for details</em>
<a name="76" href="#76">76</a>  <em>     * @see FieldFindMode</em>
<a name="77" href="#77">77</a>  <em>     */</em>
<a name="78" href="#78">78</a>      <strong>public</strong> <strong>void</strong> setFieldFindMode(FieldFindMode fieldFindMode) {
<a name="79" href="#79">79</a>          <strong>if</strong> (fieldFindMode == <strong>null</strong>) {
<a name="80" href="#80">80</a>              fieldFindMode = FieldFindMode.HYBRID;
<a name="81" href="#81">81</a>          }
<a name="82" href="#82">82</a>          <strong>if</strong> (! <strong>this</strong>.fieldFindMode.equals(fieldFindMode)) {
<a name="83" href="#83">83</a>              <em class="comment">// need to clear the cache if we change the mode</em>
<a name="84" href="#84">84</a>              getReflectionCache().clear();
<a name="85" href="#85">85</a>          }
<a name="86" href="#86">86</a>          <strong>this</strong>.fieldFindMode = fieldFindMode;
<a name="87" href="#87">87</a>      }
<a name="88" href="#88">88</a>      <strong>public</strong> FieldFindMode getFieldFindMode() {
<a name="89" href="#89">89</a>          <strong>return</strong> fieldFindMode;
<a name="90" href="#90">90</a>      }
<a name="91" href="#91">91</a>  
<a name="92" href="#92">92</a>      <strong>protected</strong> <strong>boolean</strong> includeClassField = false;
<a name="93" href="#93">93</a>      <em>/**<em>*</em></em>
<a name="94" href="#94">94</a>  <em>     * Setting to determine if the result of "getClass()" should be included in the reflection data &lt;br/></em>
<a name="95" href="#95">95</a>  <em>     * &lt;b>WARNING&lt;/b>: changing this will clear the existing cache</em>
<a name="96" href="#96">96</a>  <em>     * </em>
<a name="97" href="#97">97</a>  <em>     * @param includeClassField if true then getClass() will be treated as a readable field called "class", default is false</em>
<a name="98" href="#98">98</a>  <em>     */</em>    
<a name="99" href="#99">99</a>      <strong>public</strong> <strong>void</strong> setIncludeClassField(<strong>boolean</strong> includeClassField) {
<a name="100" href="#100">100</a>         <strong>if</strong> (<strong>this</strong>.includeClassField != includeClassField) {
<a name="101" href="#101">101</a>             <em class="comment">// need to clear the cache if we change this</em>
<a name="102" href="#102">102</a>             getReflectionCache().clear();
<a name="103" href="#103">103</a>         }
<a name="104" href="#104">104</a>         <strong>this</strong>.includeClassField = includeClassField;
<a name="105" href="#105">105</a>     }
<a name="106" href="#106">106</a>     <strong>public</strong> <strong>boolean</strong> isIncludeClassField() {
<a name="107" href="#107">107</a>         <strong>return</strong> includeClassField;
<a name="108" href="#108">108</a>     }
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a> 
<a name="111" href="#111">111</a>     <strong>public</strong> <strong>int</strong> lookups = 0;
<a name="112" href="#112">112</a>     <strong>public</strong> <strong>int</strong> cacheHits = 0;
<a name="113" href="#113">113</a>     <strong>public</strong> <strong>int</strong> cacheMisses = 0;
<a name="114" href="#114">114</a> 
<a name="115" href="#115">115</a>     @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="116" href="#116">116</a>     <strong>protected</strong> Map&lt;Class&lt;?>, ClassFields> reflectionCache = <strong>null</strong>;
<a name="117" href="#117">117</a>     @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="118" href="#118">118</a>     <strong>protected</strong> Map&lt;Class&lt;?>, ClassFields> getReflectionCache() {
<a name="119" href="#119">119</a>         <strong>if</strong> (reflectionCache == <strong>null</strong>) {
<a name="120" href="#120">120</a>             <em class="comment">// internally we are using the ReferenceMap (from the Guice codebase)</em>
<a name="121" href="#121">121</a>             <em class="comment">// modeled after the groovy reflection caching (weak -> soft)</em>
<a name="122" href="#122">122</a>             reflectionCache = <strong>new</strong> ReferenceMap&lt;Class&lt;?>,ClassFields>(ReferenceType.WEAK, ReferenceType.SOFT);
<a name="123" href="#123">123</a>         }
<a name="124" href="#124">124</a>         <strong>return</strong> reflectionCache;
<a name="125" href="#125">125</a>     }
<a name="126" href="#126">126</a>     <em>/**<em>*</em></em>
<a name="127" href="#127">127</a> <em>     * Set the cache to be used for holding the reflection data, </em>
<a name="128" href="#128">128</a> <em>     * this allows control over where the reflection caches are stored,</em>
<a name="129" href="#129">129</a> <em>     * this should store the data in a way that it will not hold open the classloader the class comes from &lt;br/></em>
<a name="130" href="#130">130</a> <em>     * Note that you can set this to a map implementation which does not store anything to disable caching if you like</em>
<a name="131" href="#131">131</a> <em>     * </em>
<a name="132" href="#132">132</a> <em>     * @param reflectionCache a cache for holding class cache data (implements map), null to use the default internal cache</em>
<a name="133" href="#133">133</a> <em>     */</em>
<a name="134" href="#134">134</a>     @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="135" href="#135">135</a>     <strong>public</strong> <strong>void</strong> setReflectionCache(Map&lt;Class&lt;?>, ClassFields> reflectionCache) {
<a name="136" href="#136">136</a>         <strong>if</strong> (reflectionCache != <strong>null</strong>) {
<a name="137" href="#137">137</a>             <strong>this</strong>.reflectionCache.clear();
<a name="138" href="#138">138</a>             <strong>this</strong>.reflectionCache = reflectionCache;
<a name="139" href="#139">139</a>         } <strong>else</strong> {
<a name="140" href="#140">140</a>             getReflectionCache();
<a name="141" href="#141">141</a>         }
<a name="142" href="#142">142</a>     }
<a name="143" href="#143">143</a> 
<a name="144" href="#144">144</a>     <em>/**<em>*</em></em>
<a name="145" href="#145">145</a> <em>     * Get the class fields analysis of a class which contains information about that class and its fields,</em>
<a name="146" href="#146">146</a> <em>     * includes annotations, fields/properties, etc. packaged in a way which makes the data easy to get to,</em>
<a name="147" href="#147">147</a> <em>     * use the {@link ClassData} object to get to the more raw data</em>
<a name="148" href="#148">148</a> <em>     * </em>
<a name="149" href="#149">149</a> <em>     * @param &lt;T></em>
<a name="150" href="#150">150</a> <em>     * @param cls any {@link Class}</em>
<a name="151" href="#151">151</a> <em>     * @return the ClassFields analysis object which contains the information about this class</em>
<a name="152" href="#152">152</a> <em>     */</em>
<a name="153" href="#153">153</a>     @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="154" href="#154">154</a>     <strong>public</strong> &lt;T> ClassFields&lt;T> getClassFields(Class&lt;T> cls) {
<a name="155" href="#155">155</a>         <strong>if</strong> (cls == <strong>null</strong>) {
<a name="156" href="#156">156</a>             <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"cls (type) cannot be null"</span>);
<a name="157" href="#157">157</a>         }
<a name="158" href="#158">158</a>         lookups++;
<a name="159" href="#159">159</a>         ClassFields&lt;T> cf = getReflectionCache().get(cls);
<a name="160" href="#160">160</a>         <strong>if</strong> (cf == <strong>null</strong>) {
<a name="161" href="#161">161</a>             <em class="comment">// make new and put in cache</em>
<a name="162" href="#162">162</a>             cf = <strong>new</strong> ClassFields&lt;T>(cls, FieldFindMode.HYBRID, false, includeClassField);
<a name="163" href="#163">163</a>             getReflectionCache().put(cls, cf);
<a name="164" href="#164">164</a>             cacheMisses++;
<a name="165" href="#165">165</a>         } <strong>else</strong> {
<a name="166" href="#166">166</a>             cacheHits++;
<a name="167" href="#167">167</a>         }
<a name="168" href="#168">168</a>         <strong>return</strong> cf;
<a name="169" href="#169">169</a>     }
<a name="170" href="#170">170</a> 
<a name="171" href="#171">171</a>     <em>/**<em>*</em></em>
<a name="172" href="#172">172</a> <em>     * Convenience Method: &lt;br/></em>
<a name="173" href="#173">173</a> <em>     * Gets the class data object which contains information about this class,</em>
<a name="174" href="#174">174</a> <em>     * will retrieve this from the class data cache if available or generate it if not&lt;br/></em>
<a name="175" href="#175">175</a> <em>     * This is also available from the {@link ClassFields} object</em>
<a name="176" href="#176">176</a> <em>     * </em>
<a name="177" href="#177">177</a> <em>     * @param &lt;T></em>
<a name="178" href="#178">178</a> <em>     * @param cls any {@link Class}</em>
<a name="179" href="#179">179</a> <em>     * @return the class data cache object (contains reflected data from this class)</em>
<a name="180" href="#180">180</a> <em>     */</em>
<a name="181" href="#181">181</a>     <strong>public</strong> &lt;T> ClassData&lt;T> getClassData(Class&lt;T> cls) {
<a name="182" href="#182">182</a>         ClassFields&lt;T> cf = getClassFields(cls);
<a name="183" href="#183">183</a>         <strong>return</strong> cf.getClassData();
<a name="184" href="#184">184</a>     }
<a name="185" href="#185">185</a> 
<a name="186" href="#186">186</a>     <em>/**<em>*</em></em>
<a name="187" href="#187">187</a> <em>     * Convenience Method: &lt;br/></em>
<a name="188" href="#188">188</a> <em>     * Analyze an object and produce an object which contains information about it and its fields,</em>
<a name="189" href="#189">189</a> <em>     * see {@link ClassDataCacher#getClassData(Class)}</em>
<a name="190" href="#190">190</a> <em>     * </em>
<a name="191" href="#191">191</a> <em>     * @param &lt;T></em>
<a name="192" href="#192">192</a> <em>     * @param obj any {@link Object}</em>
<a name="193" href="#193">193</a> <em>     * @return the ClassFields analysis object which contains the information about this objects class</em>
<a name="194" href="#194">194</a> <em>     * @throws IllegalArgumentException if obj is null</em>
<a name="195" href="#195">195</a> <em>     */</em>
<a name="196" href="#196">196</a>     @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="197" href="#197">197</a>     <strong>public</strong> &lt;T> ClassFields&lt;T> getClassFieldsFromObject(Object obj) {
<a name="198" href="#198">198</a>         <strong>if</strong> (obj == <strong>null</strong>) {
<a name="199" href="#199">199</a>             <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"obj cannot be null"</span>);
<a name="200" href="#200">200</a>         }
<a name="201" href="#201">201</a>         Class&lt;T> cls = (Class&lt;T>) obj.getClass();
<a name="202" href="#202">202</a>         <strong>return</strong> getClassFields(cls);
<a name="203" href="#203">203</a>     }
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>     <em>/**<em>*</em></em>
<a name="206" href="#206">206</a> <em>     * Convenience Method: &lt;br/></em>
<a name="207" href="#207">207</a> <em>     * Gets the class data object which contains information about this objects class,</em>
<a name="208" href="#208">208</a> <em>     * will retrieve this from the class data cache if available or generate it if not&lt;br/></em>
<a name="209" href="#209">209</a> <em>     * This is also available from the {@link ClassFields} object</em>
<a name="210" href="#210">210</a> <em>     * </em>
<a name="211" href="#211">211</a> <em>     * @param &lt;T></em>
<a name="212" href="#212">212</a> <em>     * @param obj any {@link Object}</em>
<a name="213" href="#213">213</a> <em>     * @return the raw ClassData cache object which contains reflection data about this objects class</em>
<a name="214" href="#214">214</a> <em>     * @throws IllegalArgumentException if obj is null</em>
<a name="215" href="#215">215</a> <em>     */</em>
<a name="216" href="#216">216</a>     <strong>public</strong> &lt;T> ClassData&lt;T> getClassData(Object obj) {
<a name="217" href="#217">217</a>         ClassFields&lt;T> cf = getClassFieldsFromObject(obj);
<a name="218" href="#218">218</a>         <strong>return</strong> cf.getClassData();
<a name="219" href="#219">219</a>     }
<a name="220" href="#220">220</a> 
<a name="221" href="#221">221</a>     <em>/**<em>*</em></em>
<a name="222" href="#222">222</a> <em>     * Clears all cached objects</em>
<a name="223" href="#223">223</a> <em>     */</em>
<a name="224" href="#224">224</a>     <strong>public</strong> <strong>void</strong> clear() {
<a name="225" href="#225">225</a>         getReflectionCache().clear(); 
<a name="226" href="#226">226</a>     }
<a name="227" href="#227">227</a> 
<a name="228" href="#228">228</a>     <em>/**<em>*</em></em>
<a name="229" href="#229">229</a> <em>     * @return the size of the cache (number of cached {@link ClassFields} entries)</em>
<a name="230" href="#230">230</a> <em>     */</em>
<a name="231" href="#231">231</a>     <strong>public</strong> <strong>int</strong> size() {
<a name="232" href="#232">232</a>         <strong>return</strong> getReflectionCache().size();
<a name="233" href="#233">233</a>     }
<a name="234" href="#234">234</a> 
<a name="235" href="#235">235</a>     @Override
<a name="236" href="#236">236</a>     <strong>public</strong> String toString() {
<a name="237" href="#237">237</a>         <strong>return</strong> <span class="string">"Cache::c="</span>+ClassDataCacher.timesCreated+<span class="string">":s="</span>+singleton+<span class="string">":fieldMode="</span>+fieldFindMode+<span class="string">":lookups="</span>+lookups+<span class="string">"::cache:hits="</span>+cacheHits+<span class="string">":misses="</span>+cacheMisses+<span class="string">":size="</span>+size()+<span class="string">":singleton="</span>+singleton;
<a name="238" href="#238">238</a>     }
<a name="239" href="#239">239</a> 
<a name="240" href="#240">240</a>     <em class="comment">// STATIC access</em>
<a name="241" href="#241">241</a> 
<a name="242" href="#242">242</a>     <strong>protected</strong> <strong>static</strong> SoftReference&lt;ClassDataCacher> instanceStorage;
<a name="243" href="#243">243</a>     <em>/**<em>*</em></em>
<a name="244" href="#244">244</a> <em>     * Get a singleton instance of this class to work with (stored statically) &lt;br/></em>
<a name="245" href="#245">245</a> <em>     * &lt;b>WARNING&lt;/b>: do not hold onto this object or cache it yourself, call this method again if you need it again</em>
<a name="246" href="#246">246</a> <em>     * @return a singleton instance of this class</em>
<a name="247" href="#247">247</a> <em>     */</em>
<a name="248" href="#248">248</a>     <strong>public</strong> <strong>static</strong> <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a> getInstance() {
<a name="249" href="#249">249</a>         <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a> instance = (instanceStorage == <strong>null</strong> ? <strong>null</strong> : instanceStorage.get());
<a name="250" href="#250">250</a>         <strong>if</strong> (instance == <strong>null</strong>) {
<a name="251" href="#251">251</a>             instance = ClassDataCacher.setInstance(<strong>null</strong>);
<a name="252" href="#252">252</a>         }
<a name="253" href="#253">253</a>         <strong>return</strong> instance;
<a name="254" href="#254">254</a>     }
<a name="255" href="#255">255</a>     <em>/**<em>*</em></em>
<a name="256" href="#256">256</a> <em>     * Set the singleton instance of the class which will be stored statically</em>
<a name="257" href="#257">257</a> <em>     * @param instance the instance to use as the singleton instance</em>
<a name="258" href="#258">258</a> <em>     */</em>
<a name="259" href="#259">259</a>     <strong>public</strong> <strong>static</strong> <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a> setInstance(<a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a> newInstance) {
<a name="260" href="#260">260</a>         <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a> instance = newInstance;
<a name="261" href="#261">261</a>         <strong>if</strong> (instance == <strong>null</strong>) {
<a name="262" href="#262">262</a>             instance = <strong>new</strong> <a href="../../../org/azeckoski/reflectutils/ClassDataCacher.html">ClassDataCacher</a>();
<a name="263" href="#263">263</a>             instance.singleton = <strong>true</strong>;
<a name="264" href="#264">264</a>         }
<a name="265" href="#265">265</a>         ClassDataCacher.timesCreated++;
<a name="266" href="#266">266</a>         instanceStorage = <strong>new</strong> SoftReference&lt;ClassDataCacher>(instance);
<a name="267" href="#267">267</a>         <strong>return</strong> instance;
<a name="268" href="#268">268</a>     }
<a name="269" href="#269">269</a> 
<a name="270" href="#270">270</a>     <strong>private</strong> <strong>static</strong> <strong>int</strong> timesCreated = 0;
<a name="271" href="#271">271</a>     <strong>public</strong> <strong>static</strong> <strong>int</strong> getTimesCreated() {
<a name="272" href="#272">272</a>         <strong>return</strong> timesCreated;
<a name="273" href="#273">273</a>     }
<a name="274" href="#274">274</a> 
<a name="275" href="#275">275</a>     <strong>private</strong> <strong>boolean</strong> singleton = false;
<a name="276" href="#276">276</a>     <strong>public</strong> <strong>final</strong> <strong>boolean</strong> isSingleton() {
<a name="277" href="#277">277</a>         <strong>return</strong> singleton;
<a name="278" href="#278">278</a>     }
<a name="279" href="#279">279</a> 
<a name="280" href="#280">280</a> }
</pre>
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